How to change Camera Angle FreeGLUT - c++

Question

I drew a rectangle in the X-Z play of a 3D, XYZ, plane using the code below.
#include <GL/glut.h>
void drawPlane() {
GLfloat A[3] = { 0, 0, 0};
GLfloat B[3] = { 1, 0, 0};
GLfloat C[3] = { 1, 0, 1};
GLfloat D[3] = { 0, 0, 1};
glBegin(GL_POLYGON);
glVertex3fv(A);
glVertex3fv(B);
glVertex3fv(C);
glVertex3fv(D);
glEnd();
}
// Display Call Back
void draw(){
glLoadIdentity();
glTranslatef(0.0, 0.5, 1); //i thought this would do the camera thing
drawPlane();
glutSwapBuffers();// Render Now
return;
}
// Initialization
void initialize()
{
glClearColor(0.1f, 0.1f, 0.1f, 0.1f); // Set Background Color
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear all drawings in buffer
}
// Main
int main(int argc, char* argv[])
{
glutInit(&argc, argv); // Initialize GLUT
int x = 512, y = 512; // x and y value
glutInitWindowPosition(
(int)(glutGet(GLUT_SCREEN_WIDTH) - x) / 2,
(int)(glutGet(GLUT_SCREEN_HEIGHT) - y) / 2); // Position the window's center
glutInitWindowSize(x, y); // Set the window's initial width & height
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); // ESSENTIAL BUT HAVE NO IDEA WHAT THIS DOES
glutCreateWindow("3d Bowling Game"); // Create a window with the given title
glutDisplayFunc(draw); // Register display callback handler for window re-paint
glutMainLoop(); // Enter the event-processing loop
initialize();
return 0;
}
How do I change the camera angle in order to view all of the coordinates like below.